org.drools.planner.examples.nqueens.solver.nQueensCompensationActionExperimentScoreRules.drl Maven / Gradle / Ivy
/*
* Copyright 2010 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.planner.examples.nqueens.solver;
dialect "java"
import org.drools.planner.core.score.buildin.simple.SimpleScoreHolder;
import org.drools.planner.core.score.constraint.UnweightedConstraintOccurrence;
import org.drools.planner.core.score.constraint.ConstraintType;
import org.drools.planner.examples.nqueens.domain.Queen;
global SimpleScoreHolder scoreHolder;
// ############################################################################
// Hard constraints
// ############################################################################
rule "multipleQueensHorizontal"
when
$q1 : Queen($id : id, $i : rowIndex)
$q2 : Queen(id > $id, rowIndex == $i)
then
int score = scoreHolder.getScore();
score--;
scoreHolder.setScore(score);
// TODO greatly simplify the use of compensation action
final SimpleScoreHolder finalScoreHolder = scoreHolder;
((org.drools.common.AgendaItem) kcontext.getActivation()).setActivationUnMatchListener(
new org.drools.event.rule.ActivationUnMatchListener() {
public void unMatch(org.drools.runtime.rule.WorkingMemory wm,
org.drools.runtime.rule.Activation activation) {
int score = finalScoreHolder.getScore();
score++;
finalScoreHolder.setScore(score);
}
}
);
end
// multipleQueensVertical is build-in
rule "multipleQueensAscendingDiagonal"
when
$q1 : Queen($id : id, $i : ascendingDiagonalIndex)
$q2 : Queen(id > $id, ascendingDiagonalIndex == $i)
then
int score = scoreHolder.getScore();
score--;
scoreHolder.setScore(score);
// TODO greatly simplify the use of compensation action
final SimpleScoreHolder finalScoreHolder = scoreHolder;
((org.drools.common.AgendaItem) kcontext.getActivation()).setActivationUnMatchListener(
new org.drools.event.rule.ActivationUnMatchListener() {
public void unMatch(org.drools.runtime.rule.WorkingMemory wm,
org.drools.runtime.rule.Activation activation) {
int score = finalScoreHolder.getScore();
score++;
finalScoreHolder.setScore(score);
}
}
);
end
rule "multipleQueensDescendingDiagonal"
when
$q1 : Queen($id : id, $i : descendingDiagonalIndex)
$q2 : Queen(id > $id, descendingDiagonalIndex == $i)
then
int score = scoreHolder.getScore();
score--;
scoreHolder.setScore(score);
// TODO greatly simplify the use of compensation action
final SimpleScoreHolder finalScoreHolder = scoreHolder;
((org.drools.common.AgendaItem) kcontext.getActivation()).setActivationUnMatchListener(
new org.drools.event.rule.ActivationUnMatchListener() {
public void unMatch(org.drools.runtime.rule.WorkingMemory wm,
org.drools.runtime.rule.Activation activation) {
int score = finalScoreHolder.getScore();
score++;
finalScoreHolder.setScore(score);
}
}
);
end